一种基于低速风洞大迎角装置的Cam变量赋值法  

A Cam Variable Assignment Method Based on High Angle of Attack Device in Low Speed Wind Tunnel

作　　者：黄心跃 曾伟 刘赟[1] HUANG Xinyue;ZENG Wei;LIU Yun(Low Speed Aerodynamics Research Institute,China Aerodynamics Research&Development Center,Mianyang 621000,China)

机构地区：[1]中国空气动力研究与发展中心低速空气动力研究所,四川绵阳621000

出　　处：《测控技术》2024年第9期67-72,共6页Measurement & Control Technology

摘　　要：在风洞试验装置的设计和运行中,多轴同步类运动机构的控制质量直接影响着模型的运动范围、气动特性的准确性。以4 m×3 m风洞大迎角尾撑机构为例,为保证该设备的控制准确度,运动轴之间的耦合关系由“一主一从”发展为“一主多从”和“多主一从”,而传统电子凸轮存在耦合关系单一的问题。针对上述问题,提出一种基于电子凸轮的Cam变量赋值法,将基于多项式计算的轨迹生成方式和动态生成关键点型电子凸轮表相结合,使系统不再局限于单一变量引导的控制模式,极大地减少了电子凸轮之间的切换次数,降低了设备的计算负荷和运行时间,适用于需要执行多轴联动的运动机构。In the design and operation of the wind tunnel test device,the control quality of the multi-axis syn-chronous motion mechanism directly affects the accuracy of the model motion range and aerodynamic character-istics.Taking the tail support mechanism of 4 m×3 m wind tunnel with high angle of attack as an example,in order to ensure the control accuracy of the equipment,the coupling relationship between the moving axes devel-opes from"one master and one slave"to"one master and multiple slaves"and"multiple masters and one slave",while the traditional electronic cam has the problem of single coupling relationship.In view of the above problems,a Cam variable assignment method based on electronic cam is proposed,which combines the trajecto-ry generation method based on polynomial calculation with the dynamic generation of key point type electronic cam table,so that the system is on longer limited to the single variable guiding control mode.The method great-ly reduces the number of switching between electronic cam,reduces the calculation load and running time of the equipment,and is suitable for the motion mechanism that needs to perform multi-axis linkage.

关 键 词：运动机构 变量赋值法 风洞试验 电子凸轮 

分 类 号：TP271.4[自动化与计算机技术—检测技术与自动化装置]